Invention Grant
- Patent Title: Photoelastic characterization of residual stresses and stress distributions in injection molded preforms and stretch blow-molded bottle
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Application No.: US15771450Application Date: 2016-10-28
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Publication No.: US11203145B2Publication Date: 2021-12-21
- Inventor: Ronald D. Moffitt , Yu Shi
- Applicant: The Coca-Cola Company
- Applicant Address: US GA Atlanta
- Assignee: The Coca-Cola Company
- Current Assignee: The Coca-Cola Company
- Current Assignee Address: US GA Atlanta
- Agency: Eversheds Sutherland (US) LLP
- International Application: PCT/US2016/059393 WO 20161028
- International Announcement: WO2017/075403 WO 20170504
- Main IPC: B29C49/78
- IPC: B29C49/78 ; B29C49/06 ; B29C45/76 ; B29C49/12 ; B29C49/64 ; B29C49/10 ; B29K67/00 ; B29B11/08 ; B29L31/00

Abstract:
This disclosure provides new methods to characterize and relate residual stress and orientation imparted to the injection molded polymeric preform with orientation and residual stress in the resulting blow molded bottle. The method developed allows one to define and map the coupled thermal stress histories of both processes to define applicable preferred mutual processing windows for both preform and bottle molding processes. Stretch blow-molding parameters are developed using the disclosed method.
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